Today's Philanthropy News Digest is reporting that a new study indicates that "urban schools are systematically neglecting and losing their best teachers every year, even as they retain many of their lowest-performing teachers, with serious consequences for students, schools, and the teaching profession."

According to the Digest,

Issued by TNTP, a national nonprofit dedicated to ensuring that all students are taught by excellent teachers, the report, The Irreplaceables: Understanding the Real Retention Crisis in America's Urban Schools, estimates that the nation's fifty largest school districts lose ten thousand high-performing teachers every year. These are teachers who are able to advance their students' learning by an additional two to three months in math and reading compared with the average teacher — and five to six months compared to low-performing teachers — while their students go on to demonstrate better educational and employment outcomes. What's more, when an "irreplaceable" teacher leaves a low-performing school, the chances of a potential replacement being of comparable quality is only one in eleven.